Knife head and manufacture of the same



Feb. 22, 1927e 1,618,920

F. H. DlcKsoN KNIFE HEAD AND MANUFACTURE oF Tas sfAuE Y Filed Ja'n. 2,1926 I Patented F eb. 22, 1927.

UNITED STATES PATENT OFFICE.

FRANK H. DICKSON, OF AUBURN, NEVI YORK, ASSGNOR TO HENRY 6a ALLEN, OFvAUBURN, NEW YORK.

KNIFE'HEAD AND MANUFACTURE OF THE SAME.

Application filed January 2, 1926. Serial No. 78,892.

Figures 3 and 4 are, respectively, an end and a side view of the ballmember.

Figure 5 is a sideview of the knife head blank. or body and the ballmember assembled, therewith but not upset,

Figure 6 is a sectional view showing the assembled members in positionin a holder for upsetting, .I n

Figure isa section on the hne 7 7 or Fig. G, y

Figures 8, 9 and v10 are, respectively, a plan View, a side view, and:an end view of the completed knife head, and

Figure 11is a view showing the ball niember provided with a plurality ofstuds.

According to the present invention, there is produced the main forging 1having the usual elongated shank 9', the vertical rib 3, and thelaterally-projecting flange portion or base 4. An opening 5 is formedthrough the base or flange portion 4 and the vertical rib 3 terminatesshort of this opening, as shown clearly in Fig. 1. There is alsoproduced by forging a ball member 6 having a spherical head 7, a fin orstem S extending radially from the head, and a base 9 which is unitedwith one edge of the stem and projects from the opposite sides of thesame.A

Referring to Fig. 2, it will be noted that the wall of the opening 5 isflared or beveled in opposite directions from Y its middle toward theopposite faces of the flange portion 4 of the knife head blank. It willalso be noted, on reference to Figures 3 and 4, that thestem 8 of theball member is relatively thin and flat-sided while the expanded base 9has an upper portion 10, the edge of which is beveled, and a lower studportieri 11 of uniform diameter. kThe stem 8 also has a lateralelongation or extension 1:2Y

which is adapted to overlap the end of the rib 3 and may be pinned orriveted thereto.

The dimensions of the base portion or block 9 of the ball member aresuch that when it is engaged in the opening 5 the beveled part 10 willseat snugly in the upper bevel of the opening while A the .stud 11 willproject through and depend below Vthe same, as shown in Fig. 5, thestock in the stud being suliicient, when upset, to completely lill thelower beveled half of the opening.. Instead yof providing the base ofthe ball member with a single stud 11, the same maybe provided with aplurality of studs 11a as shown in Figure 11, and the flange or baseportion 4 of the main forging 1 will of course be provided with asuitable number of holes to` receive said studs. The two studs 11a andthe holes in the base 4 to receive them may be comparatively small, sothat one of said holes may not 'be located so close to the edge of thebase 4 of the forging 1 as to sacrifice strength. Y

Preferably, the ball member is heated and is placed, inverted, in aholding die 13, as shown in Figures 6 and 7, with the head forging orbody resting on the flat upper surface of the die .around the stud. Thedie includes a movable member 14 slida'bly mounted in its main bodyportion, and the two members of the diehave their opposed faces soshaped as to produce a spherical sock-et receiving the ball or sphere 7and a groove accommodating the stem 8 and the rib 3. After the assembledparts have been firmly clamped in the die, a hammer 15 or other deviceis caused tostrike or exert pressure upon the upper end of the stud 11,upsetting the same and securely uniting the ball member and the headmember. The upset stud will be flush with the flange portion of the headand will be securely locked thereto by reason of the double-bevel or.other inter-engaging formation originally given the parts.

It is to be understood that while hot riveting is preferred, the twomembers may be united by cold riveting, welding, brazing, or by anyother method which will intimately join the parts, and that thedoublebevel formation is only a preferred interengaging constructionwhereby the stud of the ball member will be locked in the opening in thebody or head member.

y Having fully described my invention what I claim as new .and desire tosecure by Let-- ters-Patent, is:- Y

l. The process of forming a knife head which conssts in forging a headmember with a flange portion and an opening through said portion havinga double-bevel Wall, forging a ball member with a base having a beveledportion to seat upon one bevel of the opening and a stud to projectbeyond the other bevel of the opening, and upsetting the stud againstthe last-mentioned bevel.

2. The process of forming a knife-head which consists in forging a headmember With an opening therethrough having both ends iiared, forging aball member with a stem and a base, supporting the ball member ininverted position with its base extending through the opening in thehead member, and psetting the base of the ball member to iill theopening in the head member.

S. The process of forming a knife-head Which consists in forging a headmember with a flange portion. having an opening therethrough and a ribterminatimiv short of the opening. forging a ball member having a stem,a sphere at one end of the stein7 and a base at the opposite end of thestem, securing the ball member in inverted position With the baseextending through the opening in the head member and the stemoverlapping the rib of said member, upsetting the base of the ballmember upon the head member, and joining the stem of the ball memberWith the rib of the head member.

4.. The process of forming a knife head which consists in forging a headmember with a flange portion and an opening` therethrough, forging aball member With a lateral stud to engagethrough the opening, andsimultaneously locking the stud in the opening and intimately uniting itWith the flange portion of the head member at the opening,

the ball being thereby mounted in spaced relation to the flange.

5. A forged knife head comprising a head member having an opening and aball inember having a radial stud entering said opening and rigidly7secured therein whereby said ball member is rigidly secured to the headmember at said opening with the ball spaced from the head member. Y

6. A forged knife-head comprising a head member having a rib and anopening adjacent the end of the rib, and a ball member having a stemjoined to said iib and a base upset in the opening.

7. A. forged knfe-head comprising a head member having an openingtherethrough with both ends of the opening flared and a rib terminatingshort of said opening, and a ball member having a stem projectedlaterally a d united with the rib and a base upset in the fiared ends ofthe opening.

8. Means for producing forged knifeheads including clamping memberspresenting a spherical socket and a groove leading therefrom to receivethe rib of a head member and the sphere and stem of a ball memberassembled with the head member, and a pressure device cooperating Withthe clamping members to upset the end portion of the stem of the ballmember.

9. A forged knife head comprising a head member having' an openingtherethrough, and a ball member having a radial shank locked in saidopening and intimately united With the head member at the opening, theball being spaced from the head.

In testimony whereof, have signed this specification.

FRANK H. DICKSON.

